Laserfiche WebLink
MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-I413(WN0013) Geologic Unit Monitored Dakota Coal Underburden <br /> Elevation Ground Level (ft-amsl ) 5710.82 <br /> Location: N 601 969.903 E 1 , 116091 .37 T 47 N R 16 W S 36 D A C <br /> Total Drill Depth (ft) 147.0 <br /> Total Well Depth (ft) 145.6 <br /> Drilling Details <br /> Borehole Diameter (in)7 7/8 to 97.0; 6 3/4 to 147.0 Rig Speedstar 1500 <br /> Bits Tricone Driller Allan Chiles <br /> Drilling Fluid Air and water injection <br /> Additional Details Before setting casing, cleaned out hole with mist foam <br /> Drilling/Construction: Start 06/10/86 Finish 06/14/86 <br /> Lithologic Log (Y/N) Y <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs: Blank 4" id PVC sch 40 Perforated 0.02" slot <br /> Perforated Interval (s) 98.7' - 145.6' <br /> Packer and Cement Basket Set At 98.7' <br /> Cement From 90.0' To 98.7' <br /> Bentonite Slurry From 5.0' To 90.0' <br /> Gravel Pack From NA To <br /> Additional Details Because casing could not make T.D. , pulled casing and <br /> reamed with mud. Cleaned hole with MAGCO LMP. (Continued on following page) <br /> Development Summary Airlift while injecting with water for two hours; airlift <br /> (no water injection) for 1 '/2 hours. (Cleaned up, making 2 gpm) <br /> Comments , Problems Took 4 days to construct well because drillers had little to no <br /> drilling experience and had never used a mud pump. Bore hole used for well <br /> was exploration hole number 851-C. Contact between Lower Dakota Coal and <br /> Underburden @ 94.4' <br /> 15-2-36 <br /> Revised 11 /01 /86 <br />